The criminal complaint accuses Kenney of tampering with evidence on Nov. 24 or Nov. 25, or both. The tampering charge is a class 6 felony.

In Teller County court Friday, Kenney agreed to testify in the trial of Patrick Frazee, Berreth's fiance who is accused of murdering her.

"I learned Patrick Frazee had committed a homicide on approximately Nov. 22, 2018 in Teller County," Kenney said in the courtroom. "I knew that law enforcement would be investigating that crime. I moved the victim’s cell phone with the intent to impair the phone’s availability in the investigation. I had no right or authority to move the victim’s cell phone. That occurred between Nov. 24 and Nov. 25, 2018 in Teller County.”

Kenney will face her sentence after Frazee's trial and is not allowed to talk to media.

She could face penalties ranging from probation to three years in prison. She is not in custody and was not arrested, but is required to keep in touch with the court, said Fourth Judicial District Attorney Dan May.

"When Kelsey was a missing person, we were all hoping this would end much more favorably than it has at this point," May said. "It’s a horrible tragedy. It’s a horrible tragedy for their family. Horrible tragedy for our community.”

Kenney's family members told ABC News
that Frazee threatened her life, and that was why she helped him dispose of the phone. Authorities haven’t released information on how Kenney and Frazee know each other.